CN210859594U

CN210859594U - Shaft coupling

Info

Publication number: CN210859594U
Application number: CN201921952829.6U
Authority: CN
Inventors: 梁晓亮; 叶光明
Original assignee: Qinling Electrical Branch Of Shaanxi Aviation Electrical Co ltd; Shaanxi Aero Electric Co Ltd
Current assignee: Qinling Electrical Branch Of Shaanxi Aviation Electrical Co ltd; Shaanxi Aero Electric Co Ltd
Priority date: 2019-11-13
Filing date: 2019-11-13
Publication date: 2020-06-26
Anticipated expiration: 2029-11-13

Abstract

The application relates to a coupler, including coupler main body (2) and bush (5), coupler main body (2) all have the blind hole along axial front end and rear end, are provided with the screw hole on the front end blind hole lateral wall, and holding screw (3) through running through the screw hole are fixed to be arranged in the output shaft of test equipment (1) in the front end blind hole, demountable installation has bush (5) in the rear end blind hole, the inner wall of bush (5) passes through the output shaft of splined connection quilt test generator (4), wherein the hardness of bush (5) is less than the hardness of coupler main body (2). The wear of the involute spline of the output end of the tested generator is converted to the upper surface of the lining, the lining becomes a wear part in the using process, and only the wear part needs to be replaced by the wear part, so that the delivery rate of an aero-generator product is ensured.

Description

Shaft coupling

Technical Field

The application belongs to the technical field of transmission design, and particularly relates to a coupler.

Background

The coupler is a transition connection mode commonly used in mechanical transmission, and most of the existing aviation generators are connected with test equipment by adopting the coupler to finish the detection of certain performances at the stage of performing certain performance tests.

As shown in fig. 1, the conventional coupling body 2 is basically made of carbon steel and is formed by heat treatment and surface treatment. In the test, one end of the generator 4 (driven part) is connected with the generator to be tested, and the other end of the generator is connected with the test equipment 1 (driving part) and fixed through the set screw 3.

After the coupler body 2 is subjected to heat treatment, the surface hardness is relatively high, and in high-speed rotation, the rotation speed is usually 10000rpm/min to 30000rpm/min, so that the involute spline at the output end of the tested generator 4 is often abraded, and the product is unqualified in delivery. In order to avoid the abrasion of the involute spline at the output end of the tested generator 4, the improved design of the coupler structure is needed.

SUMMERY OF THE UTILITY MODEL

For solving above-mentioned problem, this application provides a shaft coupling, including shaft coupling main part and bush, the shaft coupling main part all has the blind hole along axial front end and rear end, is provided with the screw hole on the front end blind hole lateral wall, arranges in through the holding screw that runs through the screw hole fixed the output shaft of the interior test equipment of front end blind hole, demountable installation has the bush in the rear end blind hole, the inner wall of bush passes through the output shaft of splined connection by the generator of trying, wherein the hardness of bush is less than the hardness of shaft coupling main part.

Preferably, the bushing is secured within the rear blind bore of the coupling body by a fastener.

Preferably, a plurality of bar grooves that the hoop distributes are followed to the rear end blind hole inner wall of shaft coupling main part, and each bar groove extends along the axial of shaft coupling main part, the outer wall of bush along the hoop be provided with the recess that the bar groove corresponds, will the bush is installed when in the rear end blind hole of shaft coupling main part, the recess with the bar groove aligns and forms accommodation space, the fastener is installed in the accommodation space.

Preferably, the fastener is mounted in the receiving space with a tight fit.

Preferably, the bushing is made of tin bronze or brass.

Preferably, the inner wall of the bushing is provided with an involute spline groove which is matched with an involute spline of the tested generator.

This application has increased a hardness at shaft coupling and the output of generator under test and has been less than the shaft coupling, and have the bush of certain wear-resisting mechanical properties material, generally select tin bronze and brass to on having converted the wearing and tearing of the involute spline of the output of generator under test to the bush, the bush becomes for wearing and tearing spare in the use, only need change the bush after the wearing and tearing just can, guaranteed the delivery rate of aerogenerator product.

Drawings

Fig. 1 is a schematic view of a conventional coupling structure.

Fig. 2 is a schematic view of the coupling structure of the present application.

The test method comprises the following steps of 1-testing equipment, 2-a coupler main body, 3-a set screw, 4-a tested generator, 5-a bushing and 6-a fastener.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all embodiments of the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application, and should not be construed as limiting the present application. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application. Embodiments of the present application will be described in detail below with reference to the drawings.

The application provides a coupler, as shown in fig. 2, including coupler main part 2 and bush 5, coupler main part 2 all has the blind hole along axial front end and rear end, is provided with the screw hole on the front end blind hole lateral wall, arranges in through the holding screw 3 fixed of through screw hole the output shaft of test equipment 1 in the front end blind hole, demountable installation has bush 5 in the rear end blind hole, the inner wall of bush 5 passes through the output shaft of splined connection by trial generator 4, wherein the hardness of bush 5 is less than the hardness of coupler main part 2.

In some alternative embodiments, the bushing 5 is fixed in the blind hole at the rear end of the coupling body 2 by means of a fastener 6.

In some optional embodiments, a plurality of bar grooves that the hoop distributes are followed to shaft coupling main part 2's rear end blind hole inner wall, and each bar groove is along shaft coupling main part 2's axial extension, the outer wall of bush 5 along the hoop be provided with the recess that the bar groove corresponds, will bush 5 is installed when in shaft coupling main part 2's rear end blind hole, the recess with the bar groove aligns and forms accommodation space, the fastener is installed in the accommodation space, can understand through the accommodation space of occasionally setting up to and the fastener 6 of setting up for can not the rotation each other between bush 5 and shaft coupling main part 2's the rear end blind hole.

In some alternative embodiments, the fastener fits tightly within the receiving space to prevent the fastener 6 from sliding out of the receiving space. In an alternative embodiment, the fastening member 6 may be fixed in the receiving space by a cover plate, which is an annular cover plate, and the annular cover plate is fixed to the coupling body 2 by a screw after blocking the opening of the receiving space.

In an alternative embodiment, in order to ensure the relative fixation between the coupling body 2 and the bush 5, when the bush is machined, the outer circle and the inner hole of the bush are machined, and then the bush is assembled with the machined coupling, and the bush and the coupling are connected in a transition fit manner. And then processing a mounting hole of the fastener, fastening by using the fastener, aligning the central axis of the coupler and the central axis of the bushing to ensure the coaxiality requirement of the tested generator, and finally processing an inner involute spline (groove) in the bushing to obtain a new coupler.

In some alternative embodiments, the hardness of the bushing material is generally lower than that of the coupling 2, but the bushing material also needs to have certain wear-resistant mechanical properties, and the two materials, namely tin bronze and brass, are generally selected to be more.

In some alternative embodiments, the inner wall of the bushing is provided with involute spline grooves, which are matched with involute splines of the tested generator 4.

The coupling of the present application does not allow for rotation of the bushing relative to the coupling during left and right turns. The design can avoid the involute spline of the output end of the tested generator not to be worn, and the delivery rate of the generator is improved. The lining becomes a wear part in the use process, and only the lining needs to be replaced after being worn.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a coupler, its characterized in that, includes shaft coupling main part (2) and bush (5), shaft coupling main part (2) all have the blind hole along axial front end and rear end, are provided with the screw hole on the front end blind hole lateral wall, and set screw (3) through running through the screw hole are fixed to be arranged in the output shaft of test equipment (1) in the front end blind hole, demountable installation has bush (5) in the rear end blind hole, the output shaft of the inner wall of bush (5) through splined connection tested generator (4), wherein the hardness of bush (5) is less than the hardness of shaft coupling main part (2).

2. A coupling according to claim 1, characterized in that the bushing (5) is fixed in the rear blind hole of the coupling body (2) by means of a fastener (6).

3. The coupling according to claim 2, characterized in that the inner wall of the blind hole at the rear end of the coupling body (2) is provided with a plurality of strip-shaped grooves distributed along the circumferential direction, each strip-shaped groove extends along the axial direction of the coupling body (2), the outer wall of the lining (5) is provided with a groove corresponding to the strip-shaped groove along the circumferential direction, when the lining (5) is installed in the blind hole at the rear end of the coupling body (2), the groove is aligned with the strip-shaped groove to form an accommodating space, and the fastener is installed in the accommodating space.

4. A coupling according to claim 3 wherein said fastener is mounted in said receiving space with a tight fit.

5. The coupling of claim 1 wherein said bushing is selected from the group consisting of tin bronze and brass.

6. A coupling according to claim 1, wherein the inner wall of said sleeve is provided with involute spline grooves for engaging involute splines of said generator under test (4).